#ifndef RAINBOWBEAT_H
#define RAINBOWBEAT_H


#include "ESP8266lib/ext/led/WS2812B.h"

/**
 * show rainbow colors using HUE
 * use only 25% percent brightness
 * when there is a beat, switch to 100% brightness
 * and fade back to 25% again
 */
class RainbowBeat {

    int p1 = 255;
    int p2 = 63;
    int fadeOut_ticks = 0;
    int ticksLeft = 0;
    uint8_t hue = 0;

public:

    /** ctor */
    RainbowBeat() {
        ;
    }

    /** configure the amounts for idle and beat */
    void setAmounts(int p1, int p2) {
        this->p1 = p1;
        this->p2 = p2;
    }

    /** show a bight beat for x ticks */
    void flash(const int duration_ticks) {
        this->fadeOut_ticks = duration_ticks;
        this->ticksLeft = duration_ticks;
    }

    /** show a beat by shifting the hue color */
    void shift(const int val) {
        hue += val;
    }

    /** shift to the given absolute hue */
    void shiftTo(const int valAbs) {
        hue = valAbs;
    }

    /** set hue back to 0 */
    void restart() {
        this->hue = 0;
    }

    /** called from the main */
    void update() {
        if (ticksLeft > 0) {--ticksLeft;}	// fade-out
        hue += 1;
    }

    /** called from the main */
    Color getCurrent() const {
        const int percent = (ticksLeft * 100 / fadeOut_ticks);
        const int val = ((p1 * percent) + (p2 * (100-percent))) / 100;
        Color c; c.setHSV(hue, 255, val);
        return c;
    }

};


#endif // RAINBOWBEAT_H